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  • Effect of Molecular Weight On Compressor Performance
    Dear All, I have extensively studying the analysis of the impact of Molecular weight changes on fixed speed and variable speed compressors Can you provide your feedback on the below simplified summary: 1) Fixed Speed Compressor, fixed compression ratio, speed and head at every flow: a) With
  • Torque spec changes from nut to bolt head? | Eng-Tips
    In a torque spec for a typical bolt, washer and nut arrangement, is the proper torque value affected whether it is applied to the bolt head as opposed to the nut? Thanks!
  • Motor Starting Power Power Factor | Eng-Tips
    I've heard that the rule of thumb for induction motors is a starting power factor of 0 2 (which would give a starting current lower than the running current in this case) I may be over-analyzing things here but I would really like to know the relationship between starting power, starting power factor, and load characteristics
  • Specific heat ratio in gas compression | Eng-Tips
    Other equation of state will demonstrate the same behavior, the departure effect will be captured mathematically in a different manner and to a lower accuracy (with the GERG setting the benchmark) But this is accessory to the topic raised
  • Please help clarify datum shift vs bonus tolerance | Eng-Tips
    Then the datum shift is the difference between the actual size and the virtual condition size developed by the refinement tolerance If the same hole was a tertiary, the the shift is the difference between the actual size and the virtual condition size developed through the positional tolerance rather than the refinement
  • No of Passes | Eng-Tips
    What do you want to know? Your number of passes is dependent on the length of pipe you need to affect your temperature difference I can help you if you tell me a little more aout the problem Mass flow rate, required temperature difference, fluid?
  • NPSH vs. Pressure | Eng-Tips
    Hi all, I am having trouble trying to distinguish the difference between NPSH and pressure I know that NPSHr is what you must have in order for the pump to not cavitate It is equal to: (static height) + (pressure within vessel) - (vapor pressure) - (pipe friction losses) For example
  • Pinned Rolling support in Roof Truss (timber) | Eng-Tips
    Can anybody explain in simple terms for a truss newbie What is the difference between designing a truss with two pinned supports and designing it with one pinned and one rolling?
  • Internal wind pressure - Eng-Tips
    So when you get a net difference between a set internal pressure and a different exterior pressure, you get a net pressure applied to the walls of the box This is not necessarily the full internal pressure effect used in ASCE 7
  • Is this application considered Single Shear or Double Shear?
    The more meaningful distinction between "single shear" and "double shear" has to do with the how the fastener fits bends within the members, how the fastener and nut collar react moments, and the effect of eccentricity These conditions affect the static strength to some degree and may affect the fatigue strength to a greater degree





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